Apparatus for pulling stumps



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Sept., i6, 193@u A. A. SHIMER m@ APPARATUS FOR PULLING STUMPS Filed sept. 1s, ww awww-snm 2 @www Patented Sept. 16, 1930l UNITED STATES PATENT OFFICE,

ADBAHAM A. SHMER, OF WILMINGTON, DELAWAREyASSIGNOB TO HERCULES POWDER COMPANY, OF WILMINGTON, DELAWARE, CORPORATION OF DELAWARE v APPARATUS FOR PULLING STUMPS Application led September 13, 1927. Serial No. 219,186.

My invention relates-t0 an improved apparatus for pulling stumps.

Heretofore various forms of apparatus n heretofore been designed does not give satisfaction, since such apparatus either lacks the requisite power or the requisite mobility.

In the harvesting of pme stumps in connection with the extraction of turpentine, rosin etc. therefrom, it has been customary to utilize dynamite for the removal of the stumps because of the lack of suitable stump pulling apparatus. aside from the danger involved, is uneconomic since its use enables the recovery of only about one-half of the wood in the stump.

The bulge from which the lateral roots radiate, vis rich in turpentine and rosin. Some of this bulge, most of the laterals and all of the tap rootA are left in the ground.

Now it is the object of my invention to provide an improved apparatus for pulling stumps which will enable the application of great power to a stump and which will be readily moved about, thus enabling large stumps including the lateral and tap roots to be pulled bodily from the ground and permitting the apparatus to be quickly moved from j stu-mp to stump.

Having now indicated, in a general way, the nature `and purpose of my invention, I will proceed to a detailed description thereof with reference to the accompanying drawing in which y Fig. l is a side view of an apparatus embodying my invention in association with a tractor. n

Fig..,2 is an end view of vthe apparatus shown in Fig. 1. l

Fig. 3 is a plan view of the apparatus.

In the drawings a indicates a tractor, shown as' of an endlesstread type, but which may The use of dynamite,

be of any desired type. On the -tractor is supported a boom Z1 suitably braced by means of braces c and provided at'its upper end, which extends beyond the front end of the tractor frame d, with a sheave e. The tractor supports a winding drum f adapted to be driven by the tractor engine and on which is wrapped a cable g. The cable vg is led from the drum f under a sheave L, mounted on a shaft supported by brackets j-secured to the braces c, and then up and over the sheave e. The free end of cable g is secured to theapex of a tower made up of upright members c suitably braced by means of braces Z. The framework is provided with parallel runners m formed from channel section and tipped laterally. The runners are suitably secured to the lower ends of adjacent upright members 7c. vSupported from adjacent the apex of the A frame are a pair of blocks n, for example, a pair of four-sheave blocks through which is run a cable o, one

end of which is secured to the upper block and the other end of which is led under a' port chafing blocks s, which bear against.

chafing blocks 8 secured to the forward end ofthe frame ofthe-tractor. A pair of chains u are secured at their ends to the chaing blocks s and to the frame. p

It will now be observed that by winding in the cable g the A frame supporting the blocks nmay be raised off the ground and readily7 moved byoperation of the tractor to place it over a stump t to be pulled. When-the frame is in raised position, the lower end will be steadied by the 'engagement of chafing blocks s with blocks s', the latter being of a length such as to receive blocks s in all positions of the A frame, and side swing will be prevented by chains u extending' from the A frame to the tractorA as shown'in Figures 1l and 3. When the A frame is positioned over a stump it is lowered by. slackingotfA on cable g so that the r'unners m rest on the ground and in which osition the chafng blocks s will be positioned) opposite to the blocks s.

In orde` to ull the stump t the lower block n is connected) to the stump through the medium of a loop of cable "U. The loop of cable fv encircles the stump and is engaged with hooksy lw on the ends of a cable which part-ially encircles the stump and the lends of which are separated. f When the lower'block 'n is secured to the stump the cable ois wound in by operating drum g. As cable 0 is wound in, the power applied by the drum is multiplied by the blocks n and applied to the stump through the loop of cable fu, which encircles and is secured to the stump by engagement with the hooks on the end of the cable which when strain is put on it is drawn tightly about the stump.

The strain necessary to pull the stump t is resisted by the tower, which, as has been f indicated, has a bearing on the ground.

It will now noted that by virtue of my invention an ap aratus for ulling stumps is provided by wliich a given egree of power is multiplied as applied to a stump and in which the strain of pulling the stump is adequately distributed and absorbed and, at the same time, anapparatus which may be readily moved from place to place.

Having now fullydescribed my invention,

what I claim and desire to protect by Letters Patent is:

1. Apparatus for pulling stumps including in combination, a tractor, a frame structure independent of the tractor and adapted to be` positioned over a stump, a block and tackle supported from the frame structure and adapted to be connected .to a stump, means carried by the tractor for raising the frame structure clear of the ground, a hoist. ing device carried by thetractor and adapted to actuate the .tackle to draw a stump,

flexible connections between the tractor and frame structure and chafing blocks carried by the tractor and adapted to actuate the v by the tractor and frame structure whereby frame structure is guided and brace from the tractor.

2. Apparatus for pulling stumps including in combination, a tractor, a frame structure independent of the tractor, a hoisting device on the tractor, means alfording a connection between t-he top of the frame struc- -ture and said hoisting device whereby said frame structure may be raised bodily and supported from the tractor and lowered to rest on the ground, a chaiing block carried by the frame structure adjacent'its base and 

